Describe which chemicals probably made up the first cells on Earth.

In prokaryotes, termination of transcription can include which of the following? a. The formation of a hairpin structure. b. An enzyme with 5'-3' exonuclease activity. c. The transcription of a U‑rich region. d. An enzyme with helicase activity.

If the diploid number in a liver cell is 52, how many chromosomes are there is the egg of this organism?

What nonrewnewable recourse is formed in regions close to a hydrothermal vent

What are the two elements of meiosis that add variation to our population? (Hint: one occurs in prophase I and the other in metaphase I).

Where is matured sperm store in?

How are solar cells different from most other power sources?

Determine whether each statement refers to the central nervous system or the peripheral nervous system.

Which of the following functions has a requirement for thiamin? Blood coagulation Formation of red blood cells Energy release from energy-yielding nutrients Formation of epithelial cell mucopolysaccharides

Why do viruses need living hosts, such as bacteria or eukaryote cells? A) The host cell is the source of food for the virus. B) Viruses depend on the host cells that they infect to reproduce.

3. Describe the directionality of RNA polymerase action. Include the terms: DNA template strand, DNA coding strand, DNA noncoding strand, mRNA, codons, 5'-3' and 3'-5'.